Stoneworking machine



` May 19, 1925.

D. coLLlNs LesazV STONEWORKING MACHINE Filed Feb. 14. 1924 willi/51mm# ss HEMI* i llllll n lll/.W

@ M. MMM,

Patented May 19, 1925.

UNITED STATES`HPATENT OFFICE,

DOUGLASv GOLLLENS, or sALIsURY, NORTH CAROLINA.

slroivnwonxiive Meerman Applicationle; February 14, A1924. Serial No.

To all whom t may cancer i;

Be it known that I, DOUGLAS CoLLiNs, a

citizen of the United States, residingv atv Salisbury, in thecounty of Rowan and State of North Carolina, have invented certain new andI useful Improvements in Stonewoiki-ng lilachines, of which the following is a spccication.

My present invention relates to improve` ments in stone working machines of the multiple spindle or gang type wherein a pluralityfof chisels and machine tools there'- fore are employed for the purpose of tracing or grooving the surface ofa stone or other object. p i

As, herein exemplified the invention is designed for the'purpose of tracing or grooving a `chunk of stone preliminary to break-` ing the traced or grooved stone into sections or slabs which breaking is accomplished by the use of hammer blows applied 'in suit.- able manner.

In the production of paving blocks for use on streets1 the hard stone, as granite, isv

taken from the quarry in cubical chunks `and the facesr lof `the. cube or chunk are marked with parallel lines as guides for cutting the cube intov slabs; these slabs are then cut into blocks; and the blocks are finally cut into paving stones.

The primary object of my invention is to provide a. machine which' will supplant the customary manual labor employed in chiselling or tracing a groove on'tlie marked linev of the chunk or cube as above indicated, and to accomplish this purpose l utilise a number of machine tools which are supplied with motive Huid. as steam or coinpressed air. The machine toolsy are equipped` with reciprocating chisels for cut` ting the grooves, and means are provided for supporting, adjusting, and operating` these tools in suchmanuer as to expedite the required grocving or tracing of the surfaces of the cube or chunk of stone. By carryingy out my invention as a step in the manufacture of paving blocks or stones substantial advantagesarc secured in that time and labor are saved,` the cubes are accurately girooved to insure breaking into uniform and properly shaped sla-bs, and consequently the cost of production of the paving stones isreduced and their value enhanced..

The invention 'consists in certain `novel combinations and arrangements whereby the horiaotalfly operatingnfiachine tools` are Figure 2 is a horizontal sectional view,

at line 2&2 of Figure l.

Figure 3 is a front elevation of the machine with parts in sectionA for convenience of illustration.` y ,i

In 'order that aj clear ui'iderstanding of the invention may be obtained I have illus tratjed as Si a cube or chunk of stone jas granite as it comes from the quarry, with parallel lines T marked thereon alongwhich lines the grooves are to be traced. The stone or chunk isconveyed or transported from the quarry and tlirc'ugh the stonel working plant on cars indicated at A C in Figure l which run on industrial railways7 and the body of thecar is rotatable in order that various faces of the chu-nk or cube'. can be presented to the stone working machines,

the latter preferably beingv stationed at perf:

manent locations.

In the drawings the machine is adapted to cut three parallel grooves, but it will be understood that changes may be made to.`

adapt the machine fortraciiig alarger or smaller number of these grooves if desired.l Forcutting the grooves three chiselfs` are indicated as l `which are fashioned with beveled cutting edges 2 to readily adapt them for use in forming the `gi`oove as'ithe chisels pass across the face of the cube or chunh,` `Three machine tools 3y 1i, and 5 of standard type utilizzino' motive Huid.,

compressed! air, are employcdwhich are dis-` posed in a horizontal planeand adapted when in operation tc reciprocate the chi for cuttii'ig the grooves,k These machine tools are supported and relatively movable in bushings 6, 7, and S, and at `Qprovisien is made for attachn'ient offiexible pipesor' hose to the machine tools for tlie required.

supply of motive fluid'. The machine Vtools areeach fashioned with a head as `1Q which Corsets with the bushings' Gal; and te rre* vent excessive movement of the machine tool, and the usual handle 11' is employed and adapted for use in my machine as will hereinafter be described. j

To prevent displacement of the loosely carried chisels a spring v12 is 4attached to a collar 13 on the chiselshank and the end of the spring is anchored to themachine tool in suitable manner.

The cube as illustrated in Figure 1 of the drawings is approximately twenty six inches,

y and the lines T to be traced are approximately six and one half inches apart, but the distance between these lines may be varied in proportion to the size of the cube, and therefore the machine toolsare capable of adjustment toward or away from each other.

That is the two machine tools 3 and 5 may be laterally adjusted with relation to thev central, fixed tool 4. For this purpose the outer bushings 7 and 8 are provided with laterally extending flanges 14 fashioned with aline-d slots 15 and set bolts 16 are utilized to hold the flanged bushings in adjusted position. A head plate 17 which supports the two outer bushings is fashioned integral with the central bushing, or the bushing and cross head may otherwise be made rigid. The set bolts 16 are rigid with the head plate and pass upwardly through 1 the slotted flanges, and usual clamping nuts head '17 and .these members are supported to move bodily in a vertical plane in order that the chisels may be reciprocated and caused to traverse the surface of the stone during the cutting operations.

rlhe cross head and its machine tools may be elevated by the same motive fluid as employed for the operation of the machine tools, and these elements may be permitted to descend when the pressure of the motive fluid is withdrawn. For this purpose l utilize an upright cylinder 18 fixed beneath the cross head and provided with a piston 19 and rod 20 of the rectilinear type, to the upperv end of which rod the cross head is rigidly secured aslseen in Figure 3. Motive fluid may be admitted to the cylinder below the piston through the pipe 21 and controlled by the valve 22, and the cylinder may be` provided with a vent as 23 near its up-l per end. j u

v At'its extremities the cross head carries a pair of elements which are bothfashloned with a horizontally disposed guide block 24 and a vertically disposed slide block 25, the latter being movable in a vertical plane in a` rectangularframe comprising a bottom horizontal bar 26 and yupright side bars 27. These side bars are grooved at their inner sides to form guide ways 28 for retaining and guiding the slide blocks 25 of the cross head as the latter is elevated Lby fluid pressure in the cylinder and permitted to descend when pressure is released below the elevated position. From this description it will be apparent that the cross head 'and machine tools may be reciprocated vertically to cause the chisels to cut or trace vertical grooves in theadjacent face of the cube.

The bottom bar 26 of the rectangular frame orvmain frame of the machine is rigidly supported from the cylinder and in'this instance is fashioned to form the upper head of the cylinder through which the piston rod passes and in Awhich it has the required slide hearing.

The machine tools are adjustable along their longitudinal axes with relation to the cross head and the bushings carried thereby,.`

and a horizontally disposed frame 29 having heads 30 and grooves 31 for the guide blocks 24 is employed.` 'The frame is supported to slide horizontally on these blocks and the rear cross bar 32 of this adjusting frame is used for the application of power from handlever 33 pivoted at 34 in the frame and suspended to swing therefrom. The lever is` supported from a bracket 35 attached to the cross head 17 and the pivotal point of the lever is at 36 in this bracket in order that as the free end of the lever is swung to the left in Fig. l 4the adjusting frame may be slid to the right. A pawl 37 on the lever ris used to co-aet with a rack 38 on the bracket for holding the adjusting frame in operative position.

The operation of the three machine tools is vsimultaneously controlled to start and' stop, by manual power, and a single operating or control cross bar 40 and angularly disposed parallel rods 41 carried by the cross bar are utilized. These parallel rods 41 have i sockets 42 which encase and connect with the handles 11 of' thefrespective machine toolsy and co-act with the handles .for controlling the operation ofthe mechanism within the machinetools. The rods move in actual alinement with the vmachine tools and are actuated from the cross bar by means of a control lever 43 pivoted at 44 in a bracket 45 projecting forwardly and yupwardly from the cross head 17 to which thebracket is aty tached.` The rods are guided in a plate 46 having slots therethrough as indicated at 47, and springs 48 interposed between thisplate and thevcross bar 40 tend Ato hold the machine toolsidle. The slotted guide plate 46 is supported in the adjusting frame by mea-ns of CII bolts 49 and pins 50 of the slotted plate which pass through complementary slots 51 of the adjusting frame or the side bars 29 thereof.

vWhen the outer bushings 7 and 8 are adjusted laterally with relation to the fixed bushing 6 the rods 41 move bodily with these bushings and therefore the control bar is slotted at 52 for the rods.

For supporting the cutting ends `of the chisels I utilize a bracket 53 Vsupported from the head plate 17 and provided with laterally adjustable sections 54 and collars 55, it being understood that the supporting brackets are adjustable to compensate for adjustment of the bushings 7 and 8.

The adjusting frame composed of the head plate 17 side bars 29 and rear cross bar 32 and disposed in horizontal position is carried bodily in the vertical movement of the cross head, and this frame is bodily movable, transversely of the cross head, and guided by the blocks 24 of the cross head and grooves 31. of the heads 30 of the horizontal frame. The two outerbushings and their machine tools are adjustabley laterally of the central bushing and itstool.

In preparing for the tracing or grooving operation of the machine, the lever 33 is lirst pulled outwardly to slide the adjust ing frame including the head plate 17, the bushings and the machine tools toward the stone until the beveled cutting edges of the chisels engage the stone. A continued pull on the lever causes a further movement of the head plate and bushings with the adj usting frame, and as the machine tools are in engagement with and obstructed by the stone these latter elements remain stationary as the bushings slide over them. A gap is thus formed betweeny the heads 10 of the machine tools and the adjoining ends of the bushings, said gap being the width of the depth of the groove to be cut by the chiscls. By use of the pawl 87 and ratchet 3S the adjusting f ame is locked in position. If the machine tools are in the position of Figures l and 2 motive fluid pres# sure is now admitted to the elevating mechanism and at the same time the control lever 4?) is pulled to the left in Figure 1 for starting the operation of the tools. The three operating machine tools are thus elevated causing the reciprocating chisels to traverse the surface of the stone and cut their respective grooves. IV hen the clevated position is reached, the motive kfluid j )ressure may be released from the cylinder and the continually operating chisels will cut the groove on the down movement of the cross head and machine-tool frame.

obstruction is passed the cylinder and chisel are returned to projected position.

After one face of the chunk has been grooved the cube may be turned to present successively other faces for grooving as described in preparing the cube for subsequent breaking into slabs.

Having thus fully described my invention, what I claim as new and desire to secureby Letters Patent is- 1. The` combination with a vertically movable cross head and a transversely adjustable frame including a head plate, of a` fixed central bushing on the head plate and a machine tool supported therein, laterally disposed bushings carried by saidi head plate and means for adjusting said bushings relatively to the fixed bushing, and machine tools supported in said later ally disposed bushings.

2. The combination with a vertically movable cross head and a transversely adjustable supporting frame, of a fixed central bushing carried by said frame and a machine tool supported therein, lateral bushings carried by said frame .and `ma chine tools supported therein, and means for adj usting the lateral bushings relatively to the :fixed bushing. l

3. The combination with a vertically movable cross head khaving' end guide blocks, of a transversely adjustable supporting frame having complementary grooves for said blocks and means for movin' said frame, supporting bushings carried by said frame, machine tools carried in said bushings, and means for laterally spacing some of said bushings with relation to the frame. 4. The combination with a motive fluid cylinder and main frame supported thereon of a piston and rod and a cross head guided in said frame, of an adjusting frame supported on the cross head andjmovable transversely thereof, laterally adjustable bushings carried by said adjusting frame, machine tools supported in said bushings and means for moving said adjusting frame relative to the work.

In testimony whereof I affix my signature.

DOUGLAS COLLINS. 

